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United States Patent | 6,210,467 |
Howard | April 3, 2001 |
A system for cleaning a carbon dioxide gas stream of water soluble contaminants with improved recovery of carbon dioxide wherein the water soluble contaminants are removed into countercurrently flowing water which undergoes at least one pressure reduction step releasing absorbed carbon dioxide for recapture and recycle into the carbon dioxide gas stream.
Inventors: | Howard; Henry Edward (Grand Island, NY) |
Assignee: | Praxair Technology, Inc. (Danbury, CT) |
Appl. No.: | 306816 |
Filed: | May 7, 1999 |
Current U.S. Class: | 95/172; 95/174; 95/177; 95/192; 95/236; 96/234 |
Intern'l Class: | B01D 053/14 |
Field of Search: | 95/158,172,174,177,203,192,183,236 96/234 |
3593491 | Jul., 1971 | Tennyson | 95/177. |
3770622 | Nov., 1973 | Freireich et al. | 95/236. |
4080424 | Mar., 1978 | Miller et al. | 423/223. |
4184855 | Jan., 1980 | Butwell et al. | 55/48. |
4252548 | Feb., 1981 | Markbreiter et al. | 95/236. |
4305733 | Dec., 1981 | Scholz et al. | 95/236. |
4528002 | Jul., 1985 | Linde | 55/48. |
4548620 | Oct., 1985 | Albiol | 95/236. |
4589896 | May., 1986 | Chen et al. | 95/236. |
Nonhebel, "Gas Purification Processes", 1964, pp. 250-274. Zawacki et al., "Process Optimized for High Pressure Gas Cleanup", Hydrocarbon Processing, Apr., 1981. |